Smart Watch Antenna Tuning Circuit for Wearing State Adaptation
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Solution Overview
Problem
Smart watches face challenges in maintaining optimal antenna performance across different wearing states, as existing designs are typically based on free space conditions and cannot adapt to variations caused by the user's wrist or body, leading to deteriorated antenna performance and user experience.
Innovation Solution
Incorporating a sensor module, microprocessor, and antenna tuning circuit with multiple tuning paths, which use proximity sensing signals to adjust the antenna system by switching between different tuning paths or grounding/signal feed points to match the current wearing state, ensuring optimal antenna performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the antenna is designed based on free space parameters, then the antenna design process is simplified, but the antenna performance deteriorates when used in actual wearing conditions
Solution Approach 1:
The patent implements dynamic antenna tuning by switching between multiple grounding points based on detected wearing states. The antenna system transitions from a static design to a dynamic configuration that adapts to different wearing conditions (wrist vs. body), resolving the contradiction between simplified design and reliable performance.
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by switching grounding points, which alters the antenna's impedance and resonance characteristics. This allows the same physical antenna structure to achieve optimal performance across different wearing conditions without redesigning the antenna for each scenario.
2Device complexity
If the antenna system is fixed after design, then the device complexity is reduced, but the adaptability to different wearing states is lost
Solution Approach 1:
The patent segments the antenna grounding system into multiple independent grounding points that can be selectively activated. This segmentation allows the antenna to present different electrical configurations for different wearing states while maintaining a relatively simple overall structure, thus balancing device complexity with adaptability.
Solution Approach 2:
The patent incorporates sensor modules that detect wearing states and provide feedback to the control unit, which then adjusts the antenna grounding configuration accordingly. This feedback mechanism enables automatic adaptation to different wearing conditions without requiring complex manual intervention or redesign.
3Adaptability or versatility
If multiple grounding points are added to enable wearing state adaptation, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent designs the antenna structure with multiple grounding points that serve multiple functions: they provide different electrical configurations for different wearing states, and can be selectively activated based on sensor input. This multi-functionality allows the antenna system to achieve high adaptability without proportionally increasing overall device complexity.
Data Source
AI summary
An antenna signal processing circuit of a smart watch, including: a sensor module, a microprocessor, an antenna body and an antenna tuning circuit having a plurality of tuning paths. The antenna tuning circuit is connected between a smart watch signal source and the antenna body, and the microprocessor is respectively connected to the sensor module and the antenna tuning circuit. The sensor module sends a detected proximity sensing signal to the microprocessor. The microprocessor receives the proximity sensing signal, and obtains a controlling signal, to control the antenna tuning circuit to switch the tuning path and perform tuning processing on a signal from the smart watch signal source or the antenna body. A smart watch and an antenna signal processing method thereof are also provided.